Positive displacement volumetric measuring device

ABSTRACT

The system has been innovated by means of ellipses that mesh tangentially with each other, given the importance of mixing accurate amounts of liquids, or merely controlling quantities entering or leaving a reservoir. The shape of the ellipses is noteworthy in that they comprise two round parts and two flat parts, a round part of one of the ellipses meshing with a flat part of the other ellipse. The ellipses move due to a free-falling liquid passing through them, their movement or speed defining the volume of the liquid, the quantity of which is accurately measured. In order to achieve a constant accuracy, the ellipses move the drive pulley, which transmits impulses to a driven pulley through a trapezoidal belt, the driven pulley having a variable diameter to tighten the belt and maintain an accurate reading at all times. This is the innovation proposed by the POSITIVE DISPLACEMENT VOLUMETER.

BACKGROUND OF THE INVENTION

The experience we have acquired with our previous methods have promptedus to introduce the new "POSITIVE DISPLACEMENT VOLUMETER" system.

The new system, yielding an accuracy that the market was as yet lacking,covers a need that the market was demanding, that is, sometimes allowingaccurate mixtures to be obtained and sometimes simply allowing thequantity of a liquid "x" with which it is supplied to be known.

These have been our reasons for researching into and developing the"POSITIVE DISPLACEMENT VOLUMETER" system, its mechanism being describedin FIG. 5 and outlined in the previous figures.

SUMMARY OF THE INVENTION

The system works with liquids passing through a mechanism thatestablishes the precise quantity of liters passing through suchmechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the positive displacement volumeter ofthe present invention.

FIGS. 2A and 2B are end views which illustrate various states ofracetrack-shaped elements of the positive displacement volumeter of thepresent invention.

FIG. 3A illustrates the operation of a pulley used in the presentinvention and FIGS. 3B-3D are end views of pulleys used in the presentinvention.

FIG. 4A is a plan view of the pulley of FIG. 3D and FIG. 4B is aperspective view showing the pulleys and a belt used in the presentinvention.

FIG. 5 is a partial cross-sectional plan view of the positivedisplacement volumeter of FIG. 1.

DETAILED DESCRIPTION

Two racetrack-shaped surfaces 1 and 2 meshing with each other, as shownin FIG. 1, are among the various elements making up the mechanism. Theseracetrack-shaped elements 1 and 2 are shifted upon the free-flowingpassage of the liquid entering through a mouth 3 and leaving throughoutlet port 4, creating a constant volume that is full-reliably measuredby the innovative system set out hereinafter.

The flat and longer side of the racetrack-shaped element 2 in oursystem, FIG. 1, contacts between "E" and "F" with the sharpest curve ofthe opposite racetrack-shaped element 1 between "G" and "H", such thatthe line E-F of racetrack-shaped element 2 defines an exact tangent ofthe curve G-H of racetrack-shaped element 1 upon rotation, therebypermitting the volume of passing liquids to be continuously andpositively measured.

FIG. 2A shows the long and short axes of the racetrack-shaped surfacesof elements 1 and 2 lying at a right angle. FIG. 2B shows theracetrack-shaped surfaces of elements 1 and 2 in one of the manypositions that come about when they turn in the direction of the arrows.

To ratify the innovative accuracy of the system and its constantreliability, FIGS. 3B and 3C show a trapezoidal pulley 7 having avariable diameter to obtain accurate volume measurements through belttension.

FIG. 3A shows a belt 8 within the closed faces "A" of the pulley 7, andwithin the open faces "B" of the pulley 7. The same is shown in thepulley 7 with "A'" and "B'" in FIG. 3B.

FIG. 3C shows the two faces of the pulley 7 fitted at "D" to separatethe faces at "C", thereby to achieve a belt tension to absorb possibleexpansions thereof.

FIGS. 4A and 4B show the meter drive system propelled by theracetrack-shaped element 1 upon the free-flowing passage of liquids.

FIG. 4A shows a constant diameter pulley 6 that transmits the volumetricpassage of liquid to the twofold meters. This pulley 6 carries a die,faces "K" and "K'" with a rounded point "L" that provides themechanical-magnet meter with impulses through magnets 13 (See FIG. 5),pushing and activating a microswitch 17, making and breaking a circuitinside a self-powered digital counter 12 at a rate of four impulses perpulley turn. The pulley 7 tightens the belt 8 to curb clearances.

FIG. 5 describes the meter mechanism as a whole, as follows: 2) Elipse.6) Calibration (e.g. drive) Pulley. 7) Tightening (e.g. drive) pulley.8) Trapezoidal Belt. 11) Partial analog-digital counter. 12)"Hummingbird" counter. 13) Magnet. 14) Bearing. 15) Magnet support. 16)Calibration pulley. 17) Microswitch. 18) Microswitch support. 19) Screw.20) Rotor shaft. 21) Ellipse. 22) O-ring seal. 23) Setting tab. 24)Setting tab. 25) Drive rotor shaft. 26) Nut. 27) Strip and tighteningshaft. 28) Eccentric support. 29) Guard rings. 30) Meter cap. 31) Meterbody. 32) Cap retaining screw. 33) Washer. 34) Nut. 35) Counter capscrew. 36) Counter cap. 37) Total analong-digital counter.

The volumeter described above yields a verified accuracy through thevarious counters 11, 12 and 37, the impulses being correct due to theshapes of the racetrack-shaped elements 1 and 2 and the curbing ofclearances by means of the variable diameter pulley.

Accordingly, a patent is applied for in accordance with the following:

What is claimed is:
 1. A positive displacement volumeter, which is ofthe type of those formed from two rotary bodies which tangentially meshthere between and being impelled by liquid passing there between, eachof the two rotary bodies turning around its respective axis, a first ofthe rotary bodies being connected to a drive pulley, via a drive shaft,the volumeter also having a driven pulley, and having been provided atightening trapezoidal belt between said pulleys, wherein both of therotary bodies adopt approximately the form of a racetrack, both beingarranged such that each minor rounded side in a rotary body respectivelymeshes with a large flat side of the other rotary body in the form of aracetrack.
 2. The positive displacement volumeter of claim 1 wherein oneof the pulleys is a variable diameter pulley.
 3. The positivedisplacement volumeter of claim 1 wherein the driven pulley is avariable diameter pulley.
 4. The positive displacement volumeter ofclaim 2 wherein the variable diameter driven pulley has an external diewhich is limited by right faces and has rounded corners, wherein therotation of the variable diameter driven pulley pushes and activates amicroswitch to open or close a circuit inside a self-powered counter ata rate of four impulses by each rotation of the pulley.